Publication No. 980935 Rev. A
3152B User Manual
Figure 4-14, FM Panel
Standard FM Parameters -
These parameters are active only
when one of the built-in waveforms is selected as the modulating
signal. These are: Sine, Triangle, Square, or Ramp. The modulation
frequency, deviation and marker frequency control the standard FM
modulation scheme.
Modulating Wave -
Defines the shape of the modulating waveform.
There are two basic options: Standard (built-in) waveforms and
Arbitrary waveforms. If you do not need exotic waveforms, you can
use one of the built-in standard wave shapes: Sine, Triangle,
Square, or Ramp. These waveforms can be adjusted for their
frequency and deviation range. On the other hand, you can select
the arbitrary modulating wave option where you can use any shape,
although you must load the modulating waveform from an external
application, such as the FM composer in ArbConnection.
Information on the standard and arbitrary FM functions is given in
Chapter 3. Click on the button next to the required modulating
waveform shape to select it.
Arbitrary FM Parameters
– Allow adjustment of the sample clock
of the modulating waveform. These parameters are active only
when arbitrary modulating waveform option is selected. The
modulating waveform must be downloaded from an external utility
such as ArbConnection and the sample clock is programmed from
this location.
To access the required parameter, click on the parameter’s name
and observe that the LED next to the required parameter turns on.
The value that is associated with the lit LED is displayed on the
digital display. You can use the dial, keyboard, or the [
↑
] [
↓
} keys to
adjust the readout to the required setting. After you modify the
reading, click on the Modify/Execute knob to update the 3152B with
the new setting.
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